Clay-screen.



J. A. LAWLOR.

CLAY SCREEN. APPLICATION FILED MAE.10, 1910.

973,41 v Patented Oct. 18, 1910.

JAMES ALEXANDER LAWLOR, 0F PRINCE ALIBZIEERJI., SASKATCHEWAN,

CAN ADA.

CLAY-SCREEN.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application filed March 10, 1910. Serial No. 548,422.

To all whom it may concern:

Be it known that I, JAMES ALEXANDER LAWLOR, of the city of Prince Albert, in the is to devise a screen of this character particularly adapted for screening pulverized clay used for making dry pressed bricks, which will automatically screen and clear itself, and thus effectually prevent choking, and furthermore dispense with labor of men using a brush in order to keep the screen clear.

, Figure 1, is a perspective view of my improved screen. Fig. 2, is an enlarged cross section. Fig. 3, is an enlarged longitudinal section of portion ofa screen.

In the drawings like letters of reference indicate corresponding parts in each figure. A. A are the side boardsof the screen.

B is the screen proper, which is made of lily desired mesh for screening pulverized c ay. 1

C are supplemental side bars secured to the inside of the bars A and to which the bottom of the screen B is secured.

D are heating pipes suitably supported beneath the screen and designed to keep the clay dry as it passes over thescreen.

E are a series of cross bars attached to 01' forming part'of the end standards E.

F F are a series of longitudinal slats secured at the top and bottom of the screen by suitable rivets or other means.

G are a series of blocks located on the top of the slats F.

H are a series of rods extending through the side bars of the screen and upon which the slats F rest. The ends of the rods are provided with. springs H to the outside of which are located the nuts H The rods H being so held at the ends form a spring or resilient bed for the slats F. v

I are a series of plunger rods, which extend throu h the cross bars E into holes in the blocks I are collars secured in the lower ends of the plunger rods.

I are collars secured intermediate of the plunger rods and I are springs interposed between the springs I and the cross bars E.

J are a series of trip cams secured on the cross rod K, which are journaled in suitable bearings K on the side bars A. The trip cams are provided with tripping teeth J. The teeth pass underneath the collars I in their rotation and as the teeth pass the collars force the rods upwardly and the springs I force them downwardly, and thereby impart a vibratory movement to the screen, which effectually dislodges any clay, which might have a tendency to stick in the mesh of the screen.

Such a device as I describe is simple, cheap, requires practically no attention and dispenses with the use of men using brushes for keeping the screen clean.

Although I have described in detail the manner in which my invention is performed and the construction thereof, it will, of course, be understood that modifications may be made in the same without departing from the spirit of the invention.

'hat I claim as my invention is:

1. A frame comprising side boards suitably connected together, a screen extending between the side boards, longitudinal bars extending along the screen and suitably secured thereto, rods extending from side board to side boa rd below the screen and provided with spiral springs encircling the ends thereof and nuts on the ends of the rods said rods forming a support for the screen, and means for imparting a vibratory movement to'the bars as and for the purpose specified.

2. A frame comprising side boards suitabiyconnected together, a screen extending between the side boards, longitudinal bars extending along the screen and suitably secured thereto, resilient means for supporting the bars, blocks locatedon the top of the bars, cross bars suitably supported on the side boards, plunger-s extending into the blocks and through the cross bars, collars located on the plungers and spiral springs extending between the collars and the cross bars, and means for imparting a vibratory movement to the plungers as and for the purpose specified.

3. A frame comprising side boards suitably connected together, a screen extending between the side boards, longitudinal bars extending along the screen and suitably socured thereto, resilient means for supporting the bars, blocks located on the top of the bars, cross bars suitably supported on the side boards, plungers extending into the blocks and through the cross bars, collars located on the plungers and spiral springs extending between the collars and the cross bars, and means for raising the plungers and allowing them to drop as and for the purpose specified.

4. A frame comprising side boards suitably connected together, a screen extending between the side boards, longitudinal 'bars extending along-the screen and suitably secured thereto, resilient means for supporting the bars, blocks located on the top of the bars, cross bars suitably sup orted on the ,side boards, plungers exten ing into the blocks and through the cross bars, collars located on the plungers and spiral springsv extending between t e collars and the cross bars, a cross shaft journaled in suitable bearings and suitably driven, and toothed JAMES ALEXANDER LAWLOR.

Witnesses B. BOYD, R. COBAIN. 

